小题1:Some people think it is              （polite / impolite）to ask someone’s age.

小题2:If you want to              （success / succeed）in business, think big.

小题3:—Do you think it will do us good or              （harm / harmful）?

—It’s hard to say. Let’s beg for God’s help.

小题4:Jack has many            （friends / relations）, such as uncles, aunts and cousins, in Quanzhou.

小题5:．—The dictionary is a useful              （tool / way）for understanding new words.

—I agree with you.

以下措施中，（）是直接接触防护的正确措施

A.带电部分绝缘

B.遮拦或外护物用以防止与带电部分的任何接触

C.阻挡物用以防止无意地触及带电部分，并能防止故意绕过阻挡物有意识地触及带电部分

D.当回路设备中发生带电部分与外露可导电部分之间的故障时，应在10s内自动切断提供设备的电源